Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.987571E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T05:49:00+0800
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    1 Object 1

    AOE ID 51472
    NORAD ID 51472
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 54752
    NORAD ID 54752
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter STARLINK-3415 SHIYAN 21 (SY-21)
    Time of Closest Approach 2026-09-05T08:36:22+0000
    Collision Probability (Pc) 1.987571E-6
    Conjunction Distance (km) 2.018 km
    Relative Speed (km/s) 8.578 km/s
    Conjunction Risk Parameters R (Radial): 0.095 | I (In-track): -1.661 | C (Cross-track): -1.14
    Collision Risk Index (CRI) 0.41
    X Position (km) -5647.797 -5648.557
    Position Y (km) 1922.377 1920.559
    Position Z (km) -3356.784 -3356.353
    Velocity X (km/s) -4.259 -0.969
    Velocity Y (km/s) -4.094 -7.163
    Velocity Z (km/s) 4.828 -2.476

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3415 SHIYAN 21 (SY-21)
    Semimajor Axis (a) 6840.840 km 6861.217 km
    Eccentricity (e) 0.000130 0.002592
    Inclination (i) 53.1633° 35.9909°
    RAAN 201.0407° 308.6625°
    Perigee Argument 119.4790° 203.3916°
    Mean Anomaly (M) 240.6342° 156.5640°
    Apogee 463.590 km 500.865 km
    Perigee 461.816 km 465.295 km
    Orbit Epoch 2026-09-02T04:10:16+0000 2026-09-02T10:33:25+0000

    STARLINK-3415 & SHIYAN 21 (SY-21) Collision Probability (Pc) Trend

    STARLINK-3415 & SHIYAN 21 (SY-21) Collision Probability (Pc) TrendNot Available

    STARLINK-3415 & SHIYAN 21 (SY-21) Miss Distance (Miss Distance) Trend

    STARLINK-3415 & SHIYAN 21 (SY-21) Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3415Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3415Collision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3415

    No nearby objects data